:root{--bg: #f7f8fb;--surface: #ffffff;--text: #101828;--muted: #475467;--border: #d0d5dd;--brand: #1d4ed8}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Tahoma,sans-serif;background:var(--bg);color:var(--text)}a{color:var(--brand)}.page{max-width:900px;margin:0 auto;padding:24px 16px}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.header nav{display:flex;gap:12px}.card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:16px}.form-grid{display:grid;gap:12px}label{display:grid;gap:6px}textarea,input,button{font:inherit}textarea,input{width:100%;border:1px solid var(--border);border-radius:10px;padding:10px;background:#fff}button{width:fit-content;border:1px solid transparent;border-radius:10px;padding:10px 14px;background:var(--brand);color:#fff;cursor:pointer}.muted{color:var(--muted)}.history-item{padding:10px;border:1px solid var(--border);border-radius:10px;margin-top:8px}